How does this Patch work and what are the benefits of Copper Peptide GHK CU? Proprietary form of phototherapy Patented Nanocrystal Technology Reflects light to activate Non Transdermal How Peptides Clear Up Skin and Hair Problems, Now in ABQ Neurogan Health GHK Cu Copper Peptide (Ingredients Explained) As I mention in my book, N acetyl cysteine (NAC) is not found in food sources, but in the body, it converts into cysteine. NAC acts as a precursor to glutathione, a powerful GHK cu Copper Peptide: The "Glow" for Hair & Skin Seenergie PH